under
                    - ______ the book ______ her arm, Miss Gao came into the classroom ______ usual. [ ]
 - I looked under _________ table and found _________ pen I lost yesterday.
 - __________is the baseball?– It’s under the bed.
 - You are under 18 years old, so it is for you to join the Trailwalker.
 - You are under 18 years old, so it’s _______for you to join Trail walker.
 - Nowadays, children under 1.4 meters _______________ be free to take buses in some cities.
 - Tom is sitting under the tree and English .
 - is the ball? —It’s under the table.
 - under ?-My baseball.
 - is the ball? —It’s under the table.